secrecy vs covertness

secrecy and covertness both are nouns.

Word	Noun	Adjective	Verb	Adverb
secrecy	Yes	No	No	No
covertness	Yes	No	No	No

As nouns, covertness is a hyponym of secrecy; that is, covertness is a word with a more specific, narrower meaning than secrecy:

Other hyponyms of secrecy include hiddenness, bosom, confidentiality, hiding.

secrecy (noun)	covertness (noun)
the trait of keeping things secret	the state of being covert and hidden
the condition of being concealed or hidden